Improved carriage-spring



A. E. WOLCOTT. Carriage Spring Patented May 18, 1869;

spring.

parts'in thediiferent figures.

hinged to the ends of the described.

- Was gaunt llll Letters Patent Ne. 90,146, aated Ma 18,1 869.

:MP'Rovnn CARRIAGE-SPRING.

T e. Schedule referred to in these Letters Patent and making part of the shine.

To all whom it may concern.-

Be itknown that], ALLYN ELWoncorcr, ofChi- .eago, in the countyofi (look, and State of Illinois, have invented a new anduseful Improvement in Metallic Springs and. I do herehy-declarethe following to be afull, clear, and exact description of the same, refer-- ence being-had to the accompanying drawings, and the letters and figures marked-thereon, which form of this specification, and in which 1,

Figure 1 represents a side elevation of my metallic apart Figure 2, avertical sectional .view of the same. Figure 3, an'end view. Figure 4, a section at the line 2:.

Figures 5 and 6, a view of the bolt and attachment 1 that couples the link to thespring; a

The nature of my invention-consists in the combination of a straight metallic spring and a curved hearing; and also, in combination with a metallic spring restingupon a curved bearing, the jointed links, or

forceearms, the auxiliaryledges and'springs, and also the flanges and end cross-pieces, to hold the spring in place, as hereafter more fully described.

Toenable those skilled iu the art to understand how to manufacture andnse my invention, I will proceed to-describethe same with particularity.

The same letters of reference refer to corresponding In the annexed drawingr A represents a metallic spring, tempered straight,

The weight may be applied to the upper end of the said links, orarms, through 'a connecting-bar, or beam D,which rests upon the links, or arms 0, in such a way as not to make a rigid connection, but to make such a connection that the links or arms will change their angle to the line of motion of the connectingbeam D, as the spring vibrates.

In, the annexeddrawingsthere are ears, or projections on the'end of the links 0 that project under the pieces E, and holdthem intheir hearings on the connecting-beam, and at'the same time allow them to vibrate laterally. r

There may be one or more resilientsprings H'beneath the spring to whichthe links O are attached,

and there may also he one or morespring-plates I above it, forthe purpose of strengthening it; but a when there are plates l,it is necessary to have the ledges K beneath the connecting-beam D, to act upon the additional spring-plate I, and theledge's should be of such; length as to strike the curved bearing B as the springs are sprung down, at the sametimethe links or arms G strike it. I

There is a short'plane at the apex of the curved ALLYNEgWOLCOTT, or] CHICAGO, ILLINOIS, Assicnon To HIM-.. ,SELF AND Isaac simnonsor BALTIMORE, MARYLAND. y

cular bearing, compared with the length of the spring,

can be varied; but it should be sufficiently large so that the spring will strike down its entire lengthwithout breaking.

The yielding length or leverage of the spring, it will 'be observed, begins to shorten, the moment it begins are attached strike the bearing, they form a tangent I to the circle which .describes the face of the bearing. The ends of the resilient plate, or spring to which the adjusting-links O are attached,"are curved over,

and form a socket fon the end of the link to rest in, and inorder to prevent the friction of the linkfi'om wearing the spring, I put in a friction-box, b, that can be readily removed when worn.

Instead of the end of the link resting in a socket fomed by the end of the spring, as shown at S, a bolt, T, passes through'the friction-box, enclosed in the end of the spring, the bolt also passing through ears, or projections U, on the lower end ofth e links,'the holes through the ears being made square, or of any irregu lar form; and that: part "of the bolt which is within the ears, being also made to fit the same, causes the bolt said bolt. This box can be removed when worn.

It will be seen that one or more set of adjustingto be held by the arm while the friction-box turns on H links, with a corresponding number of resilient plates,-'

one resting upon another,'could he used with one curve bearing and one connecting-beam, but when more than one set'is used, they should be of such comparative length, and so arranged, as to all strike the curved hearing at the same time.

There may be lips, or projections on the sidesof the spring A, extending down to keep the auxiliary springs in pile. u

. By making aspring in this shape, I have the advantage of tempering it in its simplest form, whereby a uniform thickness and texture of metal is secured,

and a uniform temper. Then, again, a spring is less liable to be broken when bent from a straight line to a curve than when bent from a curve to a straight nne.

By placing a spring upon a curved bearing, the leverage of the spring is diminished as the weight upon it is increased, which makes it less yielding, and 'at the same time the spring is no more liable to break, for all parts of the spring are thrown into a uniform curved position, and no part of it can be thrown past that fixed curve, whatever the weight may be. So far as the advantages of curved bearings and adjusting-links are concerned, they would obtain in about the same degree with curved springs.

Having thus described the construction and operaent, isi 1. A straight metallic resilient plate, or spring, in

combination with the auxiliary spring-plate I, or its equivalent, and a curved hearing or support, when arranged so as to operate substantially as described.

2. The combination of the adjusting-links, or arms C, a metallic resilient plate, or spring, and a curved bearing, when constructed and arranged so as to 0perate substantially as and for the purpose specified.

3. The eonn0cting-beam, or bar D, adjusting-links, or arms 0, resilient plate, or spring, and curved hearing, when constructed and operating substantially as described.

4. The flanges L and projections 0, when constructed and operating substantially as and for the purposes shown and described.

5. The auxiliary ledges K and springs I, when constructed and arranged substantially as shown and specified.

Witnesses: ALLYN E. WOLGOTT.

Lnwrs L. OOBURN, J. L. 0013mm. 

